CANopen is a kind of network protocol based on CAN bus and has been used in various applications, such as vehicles, industrial machines, building automation, medical devices, maritime applications, restaurant appliances, laboratory equipment & research. It allows for not only broadcasting but also peer to peer data exchange between every CANopen node. DeviceNet based on the CAN bus is one of the world's leading device-level networks for industrial automation. It offers robust, efficient data handling and data acquisition because it is based on Producer/Consumer technology.